Contributor Handbook: Signing the CLA as corporate contributor

[svrnm]

it might be worth calling out that signing up as a corporate contributor might require some internal steps that need to be completed as well, if it exists their company's OSPO is the right point of contact for that (and also the right point of contact if everything goes south with the corporate contributor license agreement, which I saw happening a few times already).

A common requirement by corporations might also be that contributions are done using the corporate email address, if wanted I can write a few words on how one can setup their git config to make sure the right email address is used.

Originally posted by @svrnm in #2051 (comment)